| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 3 |
3.5%
|
| 1 | Airport | 12 |
14%
|
| 2 | Land border crossing | 0 |
0%
|
| 3 | Seaport | 71 |
82.6%
|
| Sysmiss | 272 |